[U-Boot] [PATCH V3 04/31] time: add wait_mask_set/clr_timeout helper functions

[Peng Fan]

Add heler functions for wait mask set/clr.

Signed-off-by: Peng Fan <peng.fan at nxp.com>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Fabio Estevam <fabio.estevam at nxp.com>
Cc: Masahiro Yamada <yamada.masahiro at socionext.com>
Cc: Simon Glass <sjg at chromium.org>
---
 include/linux/delay.h |  4 ++++
 lib/time.c            | 30 ++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/include/linux/delay.h b/include/linux/delay.h
index 3dcd435d0d..b08fcb8c09 100644
--- a/include/linux/delay.h
+++ b/include/linux/delay.h
@@ -21,4 +21,8 @@ static inline void ndelay(unsigned long nsec)
 	udelay(DIV_ROUND_UP(nsec, 1000));
 }
 
+int wait_mask_set_timeout(void *addr, u32 mask, u32 timeout);
+
+int wait_mask_clr_timeout(void *addr, u32 mask, u32 timeout);
+
 #endif /* defined(_LINUX_DELAY_H) */
diff --git a/lib/time.c b/lib/time.c
index aed1a091f2..9701287629 100644
--- a/lib/time.c
+++ b/lib/time.c
@@ -171,3 +171,33 @@ void udelay(unsigned long usec)
 		usec -= kv;
 	} while(usec);
 }
+
+int wait_mask_set_timeout(void *addr, u32 mask, u32 timeout)
+{
+	unsigned long long end_tick;
+	u32 val;
+
+	end_tick = usec_to_tick(timeout) + get_ticks();
+	do {
+		val = readl(addr);
+		if ((val & mask) == mask)
+			return 0;
+	} while (end_tick > get_ticks());
+
+	return -ETIMEDOUT;
+}
+
+int wait_mask_clr_timeout(void *addr, u32 mask, u32 timeout)
+{
+	unsigned long long end_tick;
+	u32 val;
+
+	end_tick = usec_to_tick(timeout) + get_ticks();
+	do {
+		val = readl(addr);
+		if (!(val & mask))
+			return 0;
+	} while (end_tick > get_ticks());
+
+	return -ETIMEDOUT;
+}
-- 
2.14.1